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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pääkkönen, Elina
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Durability of sandwich structures with a maximized natural raw material basis
- 2023High consistency foam in pilot scale
- 2023Durability of sandwich structures with a maximized natural raw material basis:Comparison of expanded polystyrene, cellulose foam and polylactic acid subjected to UV-rain aging
- 2021General mean-field theory to predict stress-compression behaviour of lightweight fibrous materials
- 2020Crossover from mean-field compression to collective phenomena in low-density foam-formed fiber materialcitations
- 2017Recycled fibres and fibre sludge as reinforcement materials in injection moulded PP and PLA compositescitations
- 2016Recycled fibres and fibre sludge as reinforcement materials in injection molded composites
- 2016Wood fibre based thermal insulation and sound absorption materials made by foam forming
- 2013Porous wood fibre structures for tomorrow markets
- 2013Enhanced wood plastic composites
Places of action
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document
High consistency foam in pilot scale
Abstract
Resource-efficientprocessingisoneofthepathwaystomanufacturingsustainablefoam-formed products. Replacingthecurrentfoaming methodswithHigh-ConsistencyFoam(HCF)canreduce resourceconsumptionintermsof water, andequipmentfootprint. Therefore,wecarriedoutpilot-scale HCF trials to address requirements on the process equipment and parameters to generate low-densityporousstructures.ThepilotscaleHCFunitcomprisedof unitoperationsinthefollowing order: (a) 200 L mixing tankwith pitched blade turbines, (b) centrifugal pump with an air-removal system, (c) Headbox with 5 mm and 8 mm rectangular openings and (d) pilot machine with 300 mmand 700 mmweb, impingementand through-airdriers.A mixture of softwood(SW)and hardwood(HW),from 8% to 14%consistencies,were used. 4 to 6 g/L of non-ionic Simulsol 10 was used as a surfactant.Wefoundthat a dualimpellersystem cangeneratehomogeneousHCFwith14%consistency(50%SW+50%HW)resultingin the lowestwetfoamdensityof160g/L. Besides,higher mixing power wasrequiredfor pure SW foam compared toHW foam. The headbox with an 8 mmopening and640mmwidthworkedbetter,whereasthe 5mmopeningencountered frequent blockageprobably due to the too-low flow rates. A minimum flow rate of 0.2 L/sec was required to avoid backpressureand to distribute the foam inside the headbox evenly. Highly porous low-densitysamplesin the density of 20-80 kg/m3were examined using x-ray tomography to detect the structures’flowchannels/weakpoints. HWwaseasierto foamwithoutflocks,butthestructurewasbrittle whereas themixture of HW andSW enhanced the structure. In summary, an improved understanding ofthe operating parameters of different unit operations (mixer, pump, head box,and pilot machine) to form low-density webs with HCF was achieved.